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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






2. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






3. (FSH) causes egg to mature in females






4. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






5. Animal which has been castrated after puberty






6. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






7. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






8. ~60 days before calving






9. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






10. The more stressed out the male is - the less sperm he is going to produce






11. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






12. Check feet and legs - look for masculine traits in build such as crest and muscling






13. Not under a timeline - cow can not be sold as steak






14. 14-19 (17) days






15. Implies the amount of estrogen production






16. (FSH) causes egg to mature in females






17. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






18. Milk is 15% ________ and 85% __________.






19. (LH) stimulates the Leydig cells to produce testosterone






20. Help to signal hormone levels which we need both in the brain right next to each other.






21. 14-19 (17) days






22. 147 days






23. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






24. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






25. Luteolysis happens because of the ____________ hormone






26. Contains and regulates the temp of the testes for sperm production






27. 30 hours after estrus begins






28. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






29. Failure to have one testis (gonad) to descend






30. 1-2 days






31. Can survive ~7 days in cow. vast majority <48 hours






32. ~305 days (altough often longer due to breeding difficulties)






33. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






34. Animals which have only one estrous cycle (ex: dog - fox)






35. 283 days






36. 16-20 hours






37. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






38. 30 hours after estrus begins






39. 19-23 (21) days






40. Depository for semen during insemination. where urine leaves the body






41. Luteolysis happens because of the ____________ hormone






42. Duct through penis that carries sperm and urine






43. When are steers and heifers weaned from bottle feeding?






44. Superior genes are _______ to multiply






45. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






46. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






47. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






48. Days which have increasing daylight hours

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49. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






50. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated